Free domain tool
Check one domain for a limited SSL, DNS and HTTPS health summary.
This free scan shows a minimized summary only. It does not expose raw DNS records, IP addresses or internal errors. The Security Headers Checker shows only a small, sanitized allowlist of supported response headers.
Domain Health Check offers a fuller explanation of the same public scan signals. Need to focus on DNS? Try the DNS Health Check. Need to focus on certificates? Try the SSL Certificate Checker. Need to check HTTP header presence? Try the Security Headers Checker. Need to focus only on DMARC policy? Try the DMARC Checker. Need to focus only on SPF? Try the SPF Record Checker. Need to check one known selector? Try the DKIM Checker.
Use the domain monitoring checklist to turn a one-time scan into a repeatable review.